Pythagoras studied odd and even numbers, triangular numbers, and perfect numbers. Pythagoreans contributed to our understanding of angles, triangles, areas, proportion, polygons, and polyhedra
Pythagoras
Pythagoras is called the father of numbers because he discovered the Pythagoras theoram.
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An Integer?
Hippasus, However Pythagoras could not accept the existence of irrational numbers, because he believed that all numbers had perfect values. But he could not disprove Hippasus' "irrational numbers" and so Hippasus was thrown overboard and drowned.
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all is numbers
Pythagoras.
Pythagoras said that all things are numbers. Because the characteristics of an atom can be described in numbers, any substance can be expressed as a combination of these numbers.